Pump for refrigerating apparatus



1,635,615 A. GREEN PUMP FOR. REFRIGERATING APPARATUS FIGJ, 7 File? May 2631925 gsneets-shaez 1 July. 1927 A. GREEN PUMP FOR HEFRIGERATING APPARATUS Filed May 26, 1925 2 Sheets-Sheet 2 FIG a FIG.5.

trolled by a flat to form the low pressure or pumping chamber. The disc or plate 1 may be of substantially circular form, while that portion of the casting or member 2 which forms the pumping chamber may be of U shape in cross section, (as shown clearly in Figure l), the axis of the cylindrical part of this portion being more or less vertical and at right angles to the centre line oil the disc or plate.

One end of the pump chamber portion 2 is closed by an integral wall 3, while the upper end has a major opening a for receiving a separate member or cylinder-block 5 which embodies the pump cylinder or cylindcrs 6. One end of the cylinder block 5 is provided with a cylinder head 7 having delivery openings from the cylinders conflexible valve member 8 which is clamped in position against the cylinder head at points intermediately of the delivery openings by a securing 1ne1nher, this securing member and the cylinder head 7 being secured to the cylinder block 5 by common bolts.

The cylinder block 5 is provided, in known manner, with openings -t'or establishing communication between the cylinder and the low pressure chamber when the respective pistons are at the bottom of their strokes.

The pistons 9 are driven by connecting rods 10 receiving motion from eccentrics or cams 11 formed as a separate member and mounted on a straight shaft 12 passing through a stulling box 13 in the aforementioned disc or plate, and also having a hearing it in the opposite wall of the pump chamber. The gland or stuffing box 13 in the disc or plate 1 may be constructed in ac cordance with my co-pending application and both the stufling box 13 and the bearing 14 are located in minor openings 1-0 extending through the plate 1 and the wall 8, so that they can be placed in position from the outside of the chamber.

The disc or plate 1 projects beyond the 1 sides of the pump chamber to form an integral external flange 4L1 which is provided with a facing 15 upon the same side as that where the pump chamber is situated. The facing 15 extends around the pump chamber, and receives one end of an enclosing hollow body 16 which forms the condensing chamber, and encloses the pump chamber, the cylinder block and the cylinder head.

This outer hollow body 16 may be provided with a suitable union into which working fluid may be fed as required, the said union being closed by a plug during normal working.

The hollow outer body which constitutes the condenser chamber is preferably of circular form in cross section, and one of the advantages gained thereby is that the power of the pump may be increased it required without altering the exterior diameter of this chamber. If it is desired to increase the power of the pump, two groups of pump cylinders may be used instead of a single group, as has been described, the groups of cylinders in such an arrangement being disposed similarly to the cylinders of a V engine.

Upon the opposite side of the disc or plate 1 from that where the pump and condenser chamhcrs are situated, I provide a housing 17, the outer wall of which contains a third bearing 18 for the shaft which drives the pump pistons. This housing serves to ruzroiumodate a reduction gearing 19 by which power is transmitted from a shaft 29, and also to enclose the shilling box 13.

The pump chamber portion may be cast with a pair of lateral hollow extensions 20 leading to openings 21 through the plate or disc 1, which openings are exterior to the hearing housing and form inlets for the working liuid or for gauges.

In the condenser chamber I may provide suitable condenser coils 532 which convey cooling water, the ends of which coils pass out through the walls of said chamber.

In another suitable part of the condenser chamber I may provide one or more reduc ing valves such as 23 constructed substantially as described in my prior British specilicatiou No. LOTS of 192%.

Apparatus constructed in accordance with the present invention may be used in conjunction with the apparatus described in my prior British specifications Nos. 3,837 of and Disposed below the condenser cooler casing is a brine tank 2 1 containing an evaporator coil 25 which is connected with the condenser cooler casing and pump by means oi pipes 26 and 27 respectively.

The lower end of the condenser cooler casing and gear case may be provided with slotted feet 28 for its attachment to a suitable base board. In addition, the disc 1 may be provided with an integral lug 30 and the housing 17 may be provided with an integral lug 31. The lugs 30 and 31 may carry sus pension rods such as The shaft- 29 is driven by an electric motor or other suitable power supply.

l v hat I claim then is 1. A compressor unit comprising in co1nbination a chamber for receiving low pressure fluid formed as a single integral casting, an integral external flange formed on one side of said chamber, a facing on said external flange, a one-piece cover engaging said tacing and completely enclosing the chamber with the exception of one wall thereof, said one external wall :t'orming together with the flange a disc like plate, said chamber having a pair of minor openings extending through opposite walls thereof, hearings in said through openings which are each capable of of the chamber, one of said bearings being disposed in the external wall and incorporating a stufling box, the other of said bearings being disposed in an internal wall, a driving shaft mounted in said bearings and projecting externally of the chamber by way of the stufling box, a cylinder block detachably mounted in a. major opening in an internal wall of the chamber, a detachable head on the cylinder block providing a valved outlet from each cylinder into the interior ofthe cover, a piston in each cylinder operatively connected with the driving shaft, and controlling an inlet port connecting the cylinder with the chamber, and an inlet in the external wall of the chamber for permitting the inflow of fluid.

2. A compressor unit comprising in comblnatlon, a chamber for receiving low pres-j sure fluid formed as a single integral casting, an integral external flange formed on one side-of said chamber, a facing on said external flange, a. one-piece cover engaging said facing and completely enclosing the chamber with the exception of one wall thereof, said one external wall forming together with the flange a disc like plate, said chamber having a pair of minor openings extending through opposite walls thereof, bearings in said through openings which are each capable of being placed in position from the exterior of the chamber, one of said bearings being disposed in the external wall and invmounted in openings in corporating a stuffing box, the other of said bearings being disposed in an internal wall, a driving shaft mounted in. said bearings and projecting externally of the chamber by Way of the stufiing box, a cylinder block detachably mounted in a major opening in an internal wall of the chamber, a detachable head on the cylinder block providing a valved outlet from each cylinder into the interior of the cover,a piston in each cylinder operatively connected with the driving shaft and controllingan inlet port connecting the cylinder with the chamber, a casing formed from a single integral casting engaging a facing on the external wall of the chamber and providing a bearing of the projecting part of the driving spindle, a motorshaft extending into the casing, reduction gearing within the casing and connecting the motor shaft with the driving shaft, said casing enclosing the part of the disc like plate in which the bearing and stuffing box are mounted, two pipe connections disposed one on either side of the casing and portions of the external wall of the chamber which are not covered by the casing, and two hollow lateral extensions formed on the chamber for reg istering with said two openings in said external wall, whereby two pipe connections provide for the inflow of low pressure fluid and for the mounting of a pressure gauge.

In witness whereof I affix my signature. ARTHUR GREEN.

for the extremity I 

